Plain-English guide to the Cook County General Business License: who needs one in unincorporated areas, the $40 fee and fines, with slides and a table.
Last reviewed October 29, 2026 · General information, not legal advice
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Cook County requires a General Business License (GBL) from businesses that operate in unincorporated Cook County, meaning land that is not inside any village, town or city. The Cook County Department of Revenue issues it. These are Cook County rules: they do not apply in DuPage, Kane, Will or Kendall counties, and a business inside a Cook County town or Chicago follows that municipality's own licensing instead. The page is for owners of small businesses, freelancers, nonprofits and professionals who rent or own space in the county.
Slide show: The Cook County business license in seven slides
What it is
Unincorporated Cook County requires a General Business License. Towns and Chicago run their own systems.
Who needs one
A business with a fixed place, owned or leased real estate, or regular stock for sale in an unincorporated area, unless exempt.
The rule
A sworn application goes to the Department of Revenue through its online portal. The license is posted at the business.
The number
$40 buys a two-year license. The current period runs 1 March 2025 to 28 February 2027.
The deadline
The County asked for payment by 1 March 2025, with a late fee after that. Its page does not describe the period after February 2027.
The penalty
Fines of $100, $250 and $500 for a first, second and third or later offense, counted per day after notice. The Director may close an unlicensed business.
A tip
Confirm first that the address is unincorporated. The County's license portal has an address check, and the Revenue office can help.
Who is covered
Situation
Covered by the County license?
Note
Keeps a fixed place of business in an unincorporated area
Yes, unless exempt
First of three triggers in the Code
Owns or leases real property there for business
Yes, unless exempt
Second trigger
Regularly keeps goods there for sale
Yes, unless exempt
Third trigger
Must already hold another County business license (for example liquor or public health)
No
Section 54-392
Exempt under federal, state or County law
No
Exempt businesses can apply for a Certificate of Exemption
Business inside an incorporated Cook County town
Not under this license
Ask that village or city
Business in Chicago
Not under this license
City of Chicago, Business Affairs and Consumer Protection
Business in DuPage, Kane, Will or Kendall County
No
Cook County rules do not reach it
How it touches your taxes and payroll
The application asks for owners' Social Security or tax ID numbers and the state sales-tax allocation code, so owners commonly gather their tax records first. It also asks for a wage certification: that pay follows the Cook County minimum wage ordinance, and that no repeated or willful violation of certain wage laws was admitted or found in the last five years. The Department of Revenue also administers County taxes such as hotel and parking lot taxes, which this page does not cover. State sales tax is in our Illinois sales and use tax guide. For the wider local picture, see our Cook County page.
Next, read the rules and numbers page for fees and penalties, then the checklist and FAQs page, which holds the Boundary-Stone License Check.
